Granted Patent
Utility
US 4,250,263 · App. 06/093,568
Method of purification of thermally stable enzymes
Inventor:
Vida Winans
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Nov 13, 1979
Inventor
Vida Winans
Assignee (at issue)
UOP LLC
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.